Question

If the roots of the equation are real and equal then find k
3m2+km+12=0​

Answer 1

Answer: 12

Step-by-step explanation:

Roots are real and equal means D=0 or $b^{2} - 4ac = 0$ for the equation $ax^{2} +bx+c = 0$.

Here, a = 3, b = k, c = 12

$k^{2} - 4(3)(12) = 0\\ k^{2} = (12)(12)$

So, k = 12